Prefabs refer to: default objects that are downloaded along with a game engine
assets you can download for free online
assets which come with pre-defined materials, scripts, etc. used from other projects
the class of objects which have been saved in a game project
The answer is D, I'm just trying to help out.

goog may have it for you

i just joined so i'm not sure but you may need to verify your email if you haven't

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